Seeding-machine



N0. 6l3,667. .Patented Nov. 8, I898.

- W. H. DAVIS.

SEEDING MACHINE.

, (Application flied. Feb. 23, 1898.)

( N n M o d e l J zrzns cm, mom-umof. WASNINGTON D c To all whom it may concern.-

UNITED STATES ATENT Fries.

WILLIAM H. DAVIS, OF LA CROSSE, IVISCONSIN.

SEEDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 613,667, dated November 8, 1898.

Application filed February 23 1898. Serial No. 6'71,34-.0. (No model.)

Be it known that LWVILLIAM H.DAVIS, a citizen of the United States, and a resident of La Crosse, in the county of La Crosse and State of WVisconsin, have invented certain new and useful Improvements in Seeding-Machines; and I do hereby declare that the following is a full, clear, and exactdescription of the invention,which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to teeth for seeding, cultivating, and other similar machines; and its object is to provide an improved construction of the same, whereby, when they strike a stone, stump, or other obstruction, they will yield or spring back, so as to avoid breaking, and after the obstruction has been passed will spring back to normal position.

The invention consists in the novel construction and combination of parts hereinafter fully described and claimed.

In the accompanying drawings, Figure 1 is an elevation of a portion of aseeding-machine with my improvements applied thereto. Fig. 2 is a longitudinal section of the same. Fig. 8 is a plan view. Fig. 4: is a detail longitudinal sectional view showing the tooth in the position it assumes after having struck an obstacle.

In the said drawings the reference-numeral 1 designates the drag-bars of a seeding-machine of any ordinary or suitable construction, and 2 a tooth, the upper end of which is pivoted to said drag-bars. Journaled to said drag-bars are the bearings 4 of a square or angular axle 5, to which is secured one end of a convolute spring 6, the other end of which is connected with a cam stop-block, hereinafter described.

The numeral 7 designates a hub provided with two arms 8, having square apertures or openings therein, through which said axle passes, so that as the hub is turned the axle will turn with it. Near the opposite end the hub is provided on opposite sides with studs 9, to which are pivoted the front ends 10 of bars 12, the other ends of which are pivoted to the said tooth. These arms near their front ends are bent so as to pass by the arms of the hub, and they are located between the dragbars, so as to be protected from injury.

The numeral 13 designates a stop-block journaled on a screw-bolt 14, passing through the drag-bars and located in front of the hub and spring and provided with a nut 15. The face of this block adjoining or adjacent to said spring and hub is rounded, forming a cam-surface 16. The free end of said spring rests against this cam-surface, and has its extremity turned or bent at an angle and en= gaging with a shoulder 17 at the front end of said cam-surface.

The operation will be readily understood. When the tooth strikes an obstruction, it will yield or fly back until the obstruction is passed, when it will be forced back to normal position by means of the spring, which is con tracted by said yielding movement.

It will be noted that the spring is wound or contracted at the inner end, the arms con nected with the tooth pulling back the hub, which by reason of the angular holes therein, with which the square axle engages, will turn the latter on its bearings, so as to wind the spring.

Should the spring become weakened from constant use or other causes, its tension can be increased by loosening the nut on the bolt 14 and turning the cam-block forward, after which the nut is again tightened, so 'as to pre= vent rotation of the block. This block also acts as a stop to limit the forward movement of the hub.

Having thus fully described my invention, what I claim is-" 1. The combination with the drag-bars and the pivoted tooth, of the square axle having bearings journaled in said bars, the hub provided with arms having angular openings through which said axle passes, the studs on opposite sides of said hub, the bars pivoted thereto and to the tooth and passing between the drag-bars, the stop-block and the spring connected with said axle and stop-block, substantially as described. 7

2. The combination with the drag-bars and the pivoted tooth, of the square axle having bearings journaled in said bars, the hub providedwith arms having angular apertures through which said axle passes, the studs on opposite sides of said hub, the bars pivoted thereto and to the tooth and passing between In testimony that I claim the foregoing as the drag-bars, the spring, one end of which is my own I have hereunto affixed my signature 10 connected with the axle, the rotatable stopin presence of two Witnesses. block with which the other end of said spring 7 5 is conhected, formed with a rounded cam-sur- WILLIAM DAVIS face,the screw-bolt passing through said block \Vitnesses:

and the nut for fastening the sztine substan- J. W. CASE, tially as described. BYRON H. VALENTINE. 

